I've been using a tool called PsobbViewToolV2.1 which can see kill counts of Limiters and gear which take kills to unlock just to keep track of unlocking stuff and to make sure I don't trade for some...

My favourite SC is still the boy in my avatar. He's so strong (the timing thing is extremely fun), and he's so cute, and he gives you a broom, even though you made it clear you're not the Janitor... ...